Border Patrol unveils drug-tunnel robots

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File-This file photo provided by the San Diego Tunnel Task Force shows the entrance to a cross-border tunnel in San Diego. The job of searching these networks can be dangerous, so the U.S. Border Patrol is unveiling its latest technology in the underground war, a wireless, camera-equipped robot that can do the job in a fraction of the time. (AP Photo/San Diego Tunnel Task Force,File)